Update. The first issue was the torque converter. The turbines were rubbing against one another in 1st, 2nd and 3rd gear. 4th gear they lock up and spin together. That's why it wasn't whining in 4th. The trans shop replaced the TC but when they added fluid... the fluid they were using (CAM2) was contaminated with something. That something was eating away at the adhesives holding the clutch plates together. They went through 3 trans rebuilds and 4 TC's until they pieced it together. They sent samples of the fluid to the lab to see what it was. Now they have 13 transmissions to flush or redo.